Small performance tweaks

Author: fee1-dead

compiler/rustc_data_structures/src/tagged_ptr/copy.rs

@@ -94,9 +94,11 @@ where
         // SAFETY: pointer_raw returns the original pointer
         unsafe { std::mem::transmute_copy(&self.pointer_raw()) }
     }
+    #[inline]
     pub fn tag(&self) -> T {
         unsafe { T::from_usize(self.packed.get() >> Self::TAG_BIT_SHIFT) }
     }
+    #[inline]
     pub fn set_tag(&mut self, tag: T) {
         let mut packed = self.packed.get();
         let new_tag = T::into_usize(tag) << Self::TAG_BIT_SHIFT;

compiler/rustc_middle/src/ty/mod.rs

@@ -1339,21 +1339,25 @@ impl<'tcx> ParamEnv<'tcx> {
         self
     }
 
+    #[inline]
     pub fn with_constness(mut self, constness: hir::Constness) -> Self {
         self.packed.set_tag(ParamTag { constness, ..self.packed.tag() });
         self
     }
 
+    #[inline]
     pub fn with_const(mut self) -> Self {
         self.packed.set_tag(ParamTag { constness: hir::Constness::Const, ..self.packed.tag() });
         self
     }
 
+    #[inline]
     pub fn without_const(mut self) -> Self {
         self.packed.set_tag(ParamTag { constness: hir::Constness::NotConst, ..self.packed.tag() });
         self
     }
 
+    #[inline]
     pub fn remap_constness_with(&mut self, mut constness: ty::BoundConstness) {
         *self = self.with_constness(constness.and(self.constness()))
     }

compiler/rustc_typeck/src/check/check.rs

@@ -1506,17 +1506,11 @@ pub(super) fn check_mod_item_types(tcx: TyCtxt<'_>, module_def_id: LocalDefId) {
     tcx.hir().visit_item_likes_in_module(module_def_id, &mut CheckItemTypesVisitor { tcx });
 }
 
-pub(super) fn check_item_well_formed(tcx: TyCtxt<'_>, def_id: LocalDefId) {
-    wfcheck::check_item_well_formed(tcx, def_id);
-}
+pub(super) use wfcheck::check_item_well_formed;
 
-pub(super) fn check_trait_item_well_formed(tcx: TyCtxt<'_>, def_id: LocalDefId) {
-    wfcheck::check_trait_item(tcx, def_id);
-}
+pub(super) use wfcheck::check_trait_item as check_trait_item_well_formed;
 
-pub(super) fn check_impl_item_well_formed(tcx: TyCtxt<'_>, def_id: LocalDefId) {
-    wfcheck::check_impl_item(tcx, def_id);
-}
+pub(super) use wfcheck::check_impl_item as check_impl_item_well_formed;
 
 fn async_opaque_type_cycle_error(tcx: TyCtxt<'tcx>, span: Span) {
     struct_span_err!(tcx.sess, span, E0733, "recursion in an `async fn` requires boxing")